diff --git a/src/engine/platform/arcade.cpp b/src/engine/platform/arcade.cpp
index 1af99eb75..0f13be178 100644
--- a/src/engine/platform/arcade.cpp
+++ b/src/engine/platform/arcade.cpp
@@ -42,7 +42,7 @@ static bool isOutput[8][4]={
   {true ,true ,true ,true},
 };
 static unsigned char dtTable[8]={
-  7,6,5,0,1,2,3,0
+  7,6,5,0,1,2,3,4
 };
 
 static int orderedOps[4]={
diff --git a/src/engine/platform/genesisshared.h b/src/engine/platform/genesisshared.h
index 22e4cd826..d2402a60d 100644
--- a/src/engine/platform/genesisshared.h
+++ b/src/engine/platform/genesisshared.h
@@ -35,7 +35,7 @@ static bool isOutput[8][4]={
   {true ,true ,true ,true},
 };
 static unsigned char dtTable[8]={
-  7,6,5,0,1,2,3,0
+  7,6,5,0,1,2,3,4
 };
 
 static int orderedOps[4]={
@@ -45,4 +45,4 @@ static int orderedOps[4]={
 #define rWrite(a,v) if (!skipRegisterWrites) {pendingWrites[a]=v;}
 #define immWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
 
-#include "fmshared_OPN.h"
\ No newline at end of file
+#include "fmshared_OPN.h"
diff --git a/src/engine/platform/ym2610shared.h b/src/engine/platform/ym2610shared.h
index c41d5520a..8d8847c2e 100644
--- a/src/engine/platform/ym2610shared.h
+++ b/src/engine/platform/ym2610shared.h
@@ -32,7 +32,7 @@ static bool isOutput[8][4]={
   {true ,true ,true ,true},
 };
 static unsigned char dtTable[8]={
-  7,6,5,0,1,2,3,0
+  7,6,5,0,1,2,3,4
 };
 
 static int orderedOps[4]={
diff --git a/src/gui/insEdit.cpp b/src/gui/insEdit.cpp
index b05f315ef..dba0b1bae 100644
--- a/src/gui/insEdit.cpp
+++ b/src/gui/insEdit.cpp
@@ -1077,7 +1077,7 @@ void FurnaceGUI::drawInsEdit() {
                     ImGui::TableNextRow();
                     ImGui::TableNextColumn();
                     ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);
-                    if (ImGui::SliderInt("##DT",&detune,-3,3)) { PARAMETER
+                    if (ImGui::SliderInt("##DT",&detune,-3,4)) { PARAMETER
                       op.dt=detune+3;
                     } rightClickable
                     ImGui::TableNextColumn();